Continuity mistake: When Ferg sets Walt's boots down, the right one tips over. But in the close up shot of Walt putting on the left boot, the right one is standing back up. But in the next shot you can't see it (if it was still standing it would be in the shot) and then we see Walt finish putting on his left boot, the right boot is back to being tipped over.
Continuity mistake: When Dave is talking to Tucker, while Tucker is on the practice tee, the number of golf balls on the ground change without Tucker hitting or adding any. When Tucker says "don't bother", there's 3 balls on the ground when previously there were only 2. He is then standing, talking to Dave, even when it cuts to Walt, Tucker is still talking and doesn't hit any balls (otherwise we would hear it). But then when he goes back to hitting the balls, there's only 1 on the ground.
Continuity mistake: When Cady is writing down Darius' name, the yellow post-it notepad is on the black desk pad. But in the next shot the post-it notepad is on her papers.
Continuity mistake: When Walt is at the Red Pony to talk to Henry, he drinks some beer and when he sets the can down there's a food basket to his left. But in the next shot the food basket is next to his right hand. It switches back and forth depending on the camera angle.
Answer: Something he made up.